An Easier-To-Align Hong-Ou-Mandel Interference Demonstration
- URL: http://arxiv.org/abs/2301.07161v1
- Date: Tue, 17 Jan 2023 20:12:03 GMT
- Title: An Easier-To-Align Hong-Ou-Mandel Interference Demonstration
- Authors: Nicholas S. DiBrita and Enrique J. Galvez
- Abstract summary: Hong-Ou-Mandel interference experiment is a fundamental demonstration of nonclassical interference.
Experiment involves the interference of two photons reaching a symmetric beamsplitter.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The Hong-Ou-Mandel interference experiment is a fundamental demonstration of
nonclassical interference and a basis for many investigations of quantum
information. This experiment involves the interference of two photons reaching
a symmetric beamsplitter. When the photons are made indistinguishable in all
possible ways, an interference of quantum amplitudes results in both photons
always leaving the same beamsplitter output port. Thus, a scan of
distinguishable parameters, such as the arrival time difference of the photons
reaching the beamsplitter, produces a dip in the coincidences measured at the
outputs of the beamsplitter. The main challenge for its implementation as an
undergraduate laboratory is the alignment of the photon paths at the
beamsplitter. We overcome this difficulty by using a pre-aligned commercial
fiber-coupled beamsplitter. In addition, we use waveplates to vary the
distinguishability of the photons by their state of polarization. We present a
theoretical description at the introductory quantum mechanics level of the two
types of experiments, plus a discussion of the apparatus alignment and list of
parts needed.
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